should i change diapers?

i use pampers swaddlers and i noticed when i take them off of LO there is red all along his butt and winky area. and it is like an outline from the diaper. its not a rash it doesnt bother him in the slightest it just seems odd to me are they too tight or should i just switch diapers

i havent tried a different size yet but i have tried putting it on looser then its too loose and practically falls off him when he pees. he hasnt had any blowouts ever unless my husband forgets to pulls the sides out